[yadifa-users] listening on non-local interfaces

Jürgen Geinitz geinitz at denic.de
Mon Oct 19 08:10:30 CEST 2015


Hello,
to speak for .DE, we are using dummy network devices to solve this

example:
[root at xxxxxx ~]# ifconfig -a
dummy0    Link encap:Ethernet  HWaddr XX
          inet addr:194.0.0.53  Bcast:194.0.0.53  Mask:255.255.255.255
          inet6 addr: XXXXX/64 Scope:Link
          inet6 addr: 2a02:568:0:2::53/64 Scope:Global
          inet6 addr: XXXXXXXXX/128 Scope:Global
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

dummy0:1  Link encap:Ethernet  HWaddr XXX
          inet addr:194.246.96.1  Bcast:194.246.96.1  Mask:255.255.255.255
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1

eth0      Link encap:Ethernet  HWaddr XXXX
      (irrelevant)

eth1      Link encap:Ethernet  HWaddr XX 
          inet addr:192.168.255.xx  Bcast:192.168.255.255 
Mask:255.255.255.0
          inet6 addr: xxx/64 Scope:Link
          inet6 addr: 2001:678:2:ffff::xx/64 Scope:Global
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:145436420885 errors:0 dropped:0 overruns:0 frame:0
          TX packets:132964649796 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:11455520307663 (10.4 TiB)  TX bytes:21461066840528 
(19.5 TiB)

lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:522 errors:0 dropped:0 overruns:0 frame:0
          TX packets:522 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:40337 (39.3 KiB)  TX bytes:40337 (39.3 KiB)

[root at xxxxxxx ~]# 

In the good old days when we were still using SunOS, similar setups were 
done using aliases on the lo interface

All the other nasty things are done inside the cisco boxes (using static 
arp tables as far as I remember).

Regards 
Juergen

yadifa-users-bounces at mailinglists.yadifa.eu schrieb am 07.10.2015 
14:36:17:

> Von: Gery Van Emelen <Gery.VanEmelen at eurid.eu>
> An: "yadifa-users at mailinglists.yadifa.eu" 
<yadifa-users at mailinglists.yadifa.eu>
> Datum: 07.10.2015 14:36
> Betreff: Re: [yadifa-users] listening on non-local interfaces
> Gesendet von: yadifa-users-bounces at mailinglists.yadifa.eu
> 
> Hi,
> 
> 
> You did not missed any configuration option.
> 
> This feature will be implemented in the near future.
> 
> 
> Gery
> 
> 
> 
> -----Original Message-----
> From: yadifa-users-bounces at mailinglists.yadifa.eu [
mailto:yadifa-users-bounces at mailinglists.yadifa.eu] On Behalf Of Peter 
Hudec
> Sent: Wednesday, October 7, 2015 1:46 PM
> To: yadifa-users at mailinglists.yadifa.eu
> Subject: [yadifa-users] listening on non-local interfaces
> 
> Hi,
> 
> our dns anycast setup requires to listen on non-local IPv4/IPv6 
addresses.
> 
> I tested the latest version 2.1.3, but if the dns daemon tried to bind 
on non/existent address /listed in listen directive/.
> 
> I did this test also on the other dns server with this result
> - Knot DNS 1.X KO
> - Knot DNS 2.X OK
> - NSD3 KO
> - NSD4 OK, with ip-transparent options
> - BIND 9.9.5 OK
> 
> Is there any configuration option I missed to activate this feature?
> If not, there is +1 vote for this feature to implement.
> 
>    best regards
>       Peter
> 
> --
> *Peter Hudec*
> Infraštruktúrny architekt
> phudec at cnc.sk <mailto:phduec at cnc.sk>
> 
> *CNC, a.s.*
> Borská 6, 841 04 Bratislava
> Recepcia: +421 2  35 000 100
> 
> Mobil:+421 905 997 203
> *www.cnc.sk* <http:///www.cnc.sk>
> 
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-- 
-------------------------
Juergen Geinitz

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Fax +49 69 27235 235
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